140 lines
4.2 KiB
PHP
140 lines
4.2 KiB
PHP
<?php
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/**
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* Validacni helper pro API vstupy.
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*
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* Pouziti:
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* $v = new Validator($input);
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* $v->required('name')->string('name', 1, 255);
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* $v->required('email')->email('email');
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* $v->int('amount', 0, 1000000);
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* $v->in('status', ['active', 'inactive']);
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* if ($v->fails()) errorResponse($v->firstError());
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*/
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declare(strict_types=1);
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class Validator
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{
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/** @var array<string, mixed> */
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private array $data;
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/** @var array<string, string> */
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private array $errors = [];
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/** @param array<string, mixed> $data */
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public function __construct(array $data)
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{
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$this->data = $data;
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}
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public function required(string $field, string $label = ''): self
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{
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$value = $this->data[$field] ?? null;
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if ($value === null || $value === '') {
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$this->errors[$field] = ($label ?: $field) . ' je povinné pole';
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}
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return $this;
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}
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public function string(string $field, int $min = 0, int $max = 0, string $label = ''): self
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{
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$value = $this->data[$field] ?? null;
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if ($value === null || $value === '') {
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return $this;
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}
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if (!is_string($value)) {
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$this->errors[$field] = ($label ?: $field) . ' musí být text';
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return $this;
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}
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$len = mb_strlen($value);
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if ($min > 0 && $len < $min) {
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$this->errors[$field] = ($label ?: $field) . " musí mít alespoň {$min} znaků";
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} elseif ($max > 0 && $len > $max) {
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$this->errors[$field] = ($label ?: $field) . " nesmí překročit {$max} znaků";
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}
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return $this;
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}
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public function int(string $field, ?int $min = null, ?int $max = null, string $label = ''): self
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{
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$value = $this->data[$field] ?? null;
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if ($value === null || $value === '') {
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return $this;
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}
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if (!is_numeric($value)) {
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$this->errors[$field] = ($label ?: $field) . ' musí být číslo';
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return $this;
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}
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$intVal = (int) $value;
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if ($min !== null && $intVal < $min) {
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$this->errors[$field] = ($label ?: $field) . " musí být alespoň {$min}";
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} elseif ($max !== null && $intVal > $max) {
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$this->errors[$field] = ($label ?: $field) . " nesmí překročit {$max}";
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}
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return $this;
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}
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public function email(string $field, string $label = ''): self
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{
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$value = $this->data[$field] ?? null;
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if ($value === null || $value === '') {
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return $this;
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}
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if (!is_string($value) || !filter_var($value, FILTER_VALIDATE_EMAIL)) {
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$this->errors[$field] = ($label ?: $field) . ' musí být platný e-mail';
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}
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return $this;
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}
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/**
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* @param list<string> $allowed
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*/
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public function in(string $field, array $allowed, string $label = ''): self
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{
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$value = $this->data[$field] ?? null;
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if ($value === null || $value === '') {
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return $this;
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}
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if (!in_array($value, $allowed, true)) {
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$this->errors[$field] = ($label ?: $field) . ' má neplatnou hodnotu';
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}
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return $this;
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}
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public function numeric(string $field, ?float $min = null, ?float $max = null, string $label = ''): self
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{
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$value = $this->data[$field] ?? null;
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if ($value === null || $value === '') {
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return $this;
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}
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if (!is_numeric($value)) {
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$this->errors[$field] = ($label ?: $field) . ' musí být číslo';
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return $this;
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}
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$numVal = (float) $value;
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if ($min !== null && $numVal < $min) {
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$this->errors[$field] = ($label ?: $field) . " musí být alespoň {$min}";
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} elseif ($max !== null && $numVal > $max) {
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$this->errors[$field] = ($label ?: $field) . " nesmí překročit {$max}";
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}
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return $this;
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}
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public function fails(): bool
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{
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return count($this->errors) > 0;
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}
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public function firstError(): string
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{
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return reset($this->errors) ?: '';
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}
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/** @return array<string, string> */
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public function errors(): array
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{
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return $this->errors;
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}
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}
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